Perhaps you should try some spelling variations:
hanh trinh » canh tranh, hanh chinh
trinh quan » tinh quang, trinh luat, trinh han
tieu sang » chieu sang, tieu dung, tiem nang
quan tong » quan trong, quan dong, quan long
cong van » cong vang, song van, cong tan
cong san » cong tac
than cau » toan cau, phan cau, than cap
khan cap » khan ap, than cap, khoan cam

You may be able to get more results by adjusting your search query.

• Performing a fuzzy search may retrieve terms with similar spellings: theo tieu sang - hanh trinh quan tong ((cong van) or (cong san)) ((than cau) or (khan cap))~.
• If you are trying to use Boolean operators, they must be ALL CAPS: theo tieu sang - hanh trinh quan tong ((cong van) OR (cong san)) ((than cau) OR (khan cap)).
• Adding a wildcard symbol may retrieve word variants: theo tieu sang - hanh trinh quan tong ((cong van) or (cong san)) ((than cau) or (khan cap))*.